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Recent questions and answers in Experimental Skills in Physics

Questions >> JEEMAIN and NEET >> Physics >> Class12 >> Experimental Skills in Physics

Coolant in radiations automobile must be

answered Feb 16, 2015 by micheal.powers

2 answers

Which of the following can be used to determine the velocity of sound in solids and gases

answered Dec 23, 2014 by christian.miles

2 answers

The main scale of a vernier calipers reads in millimeter and its vernier scale is divided into 10 divisions which coincide with 9 divisions of the main scale. When the two jaws of the instrument touch each other the seventh division of the vernier scale coincide with a scale division and the zero of the vernier lies to the right of the zero of the main scale. Furthermore, when the cylinder is tightly placed along its length between the two jaws, the zero of the vernier sale lies slightly to the left of 3.2 cm; and the fourth vernier division coincides with a scale division. What will the measured length of the cylinder be?

answered Apr 2, 2014 by balaji.thirumalai

1 answer

In the experiment to find the value of unknown resistance using meter brige the circuit is as shown below . under the condition that the galavanometer shows null deflection value of R is :

answered Mar 20, 2014 by meena.p

1 answer

Which of the following figures represents an integrated circuit?

answered Mar 20, 2014 by meena.p

1 answer

The type of graph between length of a simple pendulum and time period is

answered Mar 20, 2014 by meena.p

1 answer

Which of the following statements is true? 1)Image formed by concave lens is always virtual. 2) Images formed by convex lens is always real. 3) Images formed by convex mirror is always virtual 4) Images formed by concave mirror is always real.

answered Mar 20, 2014 by meena.p

1 answer

In transverse waves compression and rarification. 1)Occurs due to change in pressure 2) Change in density medium 3) Change in temperature of medium

answered Mar 20, 2014 by meena.p

1 answer

A two terminal device is connected in a circuit and it is found it does no conduct both in forward and reverse bias and does not conduct in DC. The device is

answered Mar 20, 2014 by meena.p

1 answer

A two terminal device is connected in a circuit and is found that it conducts when either forward biased or reverse biased and also operates both in AC and DC. The device is

answered Mar 19, 2014 by meena.p

1 answer

Which of the following statements is not true?

answered Mar 19, 2014 by meena.p

1 answer

Which of the following will cool quickly

answered Mar 19, 2014 by meena.p

1 answer

Which of the four substance has lowest specific heat

answered Mar 19, 2014 by meena.p

1 answer

Newton's law of cooling is a special case of

answered Mar 19, 2014 by meena.p

1 answer

In the experiment to find the speed of sound using resonance column if we replace the water with any other liquid the resonance position will

answered Mar 19, 2014 by meena.p

1 answer

In resonance apparatus we get?

answered Mar 19, 2014 by meena.p

1 answer

Sound wave can be

answered Mar 19, 2014 by meena.p

1 answer

A choke is used to

answered Mar 19, 2014 by meena.p

1 answer

Ultra violet mercury lamp is made of quartz and not glass because

answered Mar 19, 2014 by meena.p

1 answer

Accuracy of a potentio meter does not depends on

answered Mar 19, 2014 by meena.p

1 answer

A sensitive galvanometer is one which

answered Mar 19, 2014 by meena.p

1 answer

Which of the following instrument has largest resistance.

answered Mar 19, 2014 by meena.p

1 answer

In Newton's cooling experiment to reduce loss of heat the calorimeter should have .

answered Mar 19, 2014 by meena.p

1 answer

This symbol represents

answered Mar 19, 2014 by meena.p

1 answer

In the stress - strain graph for a wire Breaking point, yield point and Elastic limit are represented by points

answered Mar 19, 2014 by meena.p

1 answer

The output current versus time graph of a Diode as a rectifier The average value of output current is :

answered Mar 19, 2014 by meena.p

1 answer

A solid ball of steel is heated to $200^{\circ}\;C$ and left to cool. Which of the curve will show cooling of the ball.

answered Mar 19, 2014 by meena.p

1 answer

Three different materials are studied by plotting the graph between temperature against time as shown. Which is best preferred as

answered Mar 19, 2014 by meena.p

1 answer

To find focal length of convex lens using $U-V$ method. the graph between u and v is

answered Mar 19, 2014 by meena.p

1 answer

Angle of minimum deviation $\delta _m$ in a Prism depends on

answered Mar 19, 2014 by meena.p

1 answer

Part of the galvanometer which has electrical resistance is

answered Mar 19, 2014 by meena.p

1 answer

The precaution to be taken during determination of young's modulus using Searl's apparatus 1) Micrometer screw should be rotated in same direction while taking reading. 2) Reading should be taken immediately after loading or unloading to the experimental wire 3) The load added should be with in elastic limit.

answered Mar 19, 2014 by meena.p

1 answer

In the experiment to find the refractive index of the material of prism. by minimum deviation method $D_m$ the minimum deviation is observed from the graph plotted in the experiment . The graph is plotted between

answered Mar 19, 2014 by meena.p

1 answer

To find the focal length of a convex mirror we use indirect method because ,

answered Mar 19, 2014 by meena.p

1 answer

In the experiment to find internal resistance of Daniel cell using potentiometer with E as Emt of the cell 'L' the balancing length of the potentiometer wire when potentiometer circuit is closed. (when no current flows through cell. When $R= 5 \Omega $ is introduced the new balancing length is l.) Then the internal resistance of the cell is

answered Mar 19, 2014 by meena.p

1 answer

The experiment to verify ohm's law and to find 3 different wires and the graph are plotted as shown.

answered Mar 18, 2014 by meena.p

1 answer

In the Meter Bridge experiment to determine the resistance of given wire the error occurred due to non uniformity of meter bridge wire can be reduced by

answered Mar 18, 2014 by meena.p

1 answer

In Searle's experiment to determine the young's modulus of a wire. The diameter of the given wire is measured by using

answered Mar 18, 2014 by meena.p

1 answer

In the experiment to plot the graph between square of amplitude and time of a simple pendulum and dissipation of energy , the oscillation occur in viscous medium like air. the energy versus time graph looks like

answered Mar 18, 2014 by meena.p

1 answer

A copper wire of length L and cross sectional Area A is used and the corresponding current Vs voltage graph is drawn as shown.The slope of the curve becomes

answered Mar 18, 2014 by meena.p

1 answer

A drop of water falling in air reaches the ground with terminal momentum P. Another drop of water of twice the radius reaches the ground with terminal velocity will have momentum.

answered Mar 18, 2014 by meena.p

1 answer

In resonance column experiment to determine the velocity of sound, $L$ person observes first resonance at $12\;cm$. If she repeats the experiment on a very hot day her resonance column length would be

answered Mar 18, 2014 by meena.p

1 answer

Potentiometer wire is of cross sectional area $8 \times 10^{-6}m^2$ and has resistivity $40 \times 10^{-8}$. If $0.2$ amp current flows through it its potential gradient is

answered Mar 18, 2014 by meena.p

1 answer

A convex lens is used in the experiment of conjugate focus method where image of the object is formed in the same place for two positions of the lens. The size of image in 1st position is $4\;cm$ and in the second position is $16 \;cm$ . The length of the object is

answered Mar 18, 2014 by meena.p

1 answer

In a potentiometer experiment it is found that no current flows through the galvanometer when balancing length is 52 cm of potentiometer when shant resistance of $5 \Omega$ is used balancing length becomes 40 cm The internal resistance of cell is

answered Mar 18, 2014 by meena.p

1 answer

In an experiment to determine the Resistance of a coil it is found the volit meter values is $30.3\;V$ and ammeter reading is $0.020\;A$ least count of voltmeter is $0.1\;V$ and Least count of ammeter is $1\;mA$. The value of R is

answered Mar 18, 2014 by meena.p

1 answer

A beam white light when passed through prism suffers dispersion. When light is passed through hollow prism it suffers.

answered Mar 18, 2014 by meena.p

1 answer

The characteristic curve for a zener diode is shown. The zener voltage is

answered Mar 18, 2014 by meena.p

1 answer

We use spherical pendulum bob because

asked Mar 18, 2014 by meena.p

1 answer

The percentage of uncertainty in measurement given as $55 \pm 2\;kg$ is approximately.

asked Mar 18, 2014 by meena.p

1 answer

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