Physics Test - ...

A mass M is hung with a light spring. If the extra mass m is also hung with spring, the spring is stretched by x cm. Then, the time period of including mass will be

A cart of 100 kg is free to move on smooth rails and a block of 20 kg is resting on it. The surface of contact between the cart and the block is smooth. A force of 60 N is applied to the cart. Acceleration of 20 kg block in m/s2 is

Three progressive waves A, B and C are shown in the figure.

With respect to A, the progressive wave

Directions: From the statements of Assertion and Reason mark the correct answer from the options:

(a) If both assertion and reason are true and reason is the correct explanation of assertion.

(b) If both assertion and reason are true but reason is not the correct explanation of assertion.

(c) If assertion is true but reason is false.

(d) If both assertion and reason are false

Assertion: A ladder is more apt to slip, when you are high up on it than when you just begin to climb.

Reason: High up on a ladder, the torque is large and on climbing up the torque is small.

The power dissipated across an 8Ω resistor in the circuit shown here is 2 W. The power dissipated (in watts) across a 3Ω resistor is:

A sonometer wire of density 'd' and radius 'a' is held between two bridges at a distance 'l' apart. The wire has a tension 'T'. The fundamental frequency of the wire is

ABC is a triangle, forces P, Q, R act along the lines OA, OB and OC and are in equilibrium. If O is in the centre of ABC, then

Directions: The following question has four choices out of which ONLY ONE is correct.

Seven conductors each of resistance R are arranged as shown in the figure. (i), fig. (ii) and fig. (iii). If R1, R2and R3are the respective equivalent resistances between A and B, then

A police jeep moving with a velocity of 45 km/hr is chasing a thief in another jeep moving with a velocity of 153 km/hr. The police fire a bullet with muzzle velocity of 180 m/s. The velocity with which it will strike the jeep of the thief is

Let there be four articles having colours blue, red, black and white. When they are heated together and allowed to cool, which article will cool at the earliest?