If negative charges are induced on an electroscope and a positively charged rod is brought near the cap of the electroscope, the leaves will

• A) close up
• B) become positively charged
• C) become negatively charged
• D) open further

Which of the following statements about an electromagnet is correct?

• A. it is a temporary magnet
• B. its strength depends on the current
• C. its stength depends on the number of turns in its coil
• D. it has permanent poles

A thin wire with heavy weights attached to both ends is hung over a block of ice resting on two supports. If the wire cuts through the ice block while the block remains solid behind the wire, the process is called

• A. condensation
• B. sublimation
• C. regelation
• D. fusion

The opposition offered to an alternating current in a C-R series circuit is known as

• A. impedance
• B. resistance
• C. reactance
• D. friction

Which of the following is not a mechanical wave?

• A. wave propagatd in stretched string
• B. wave in closed pipe
• C. radio waves
• D. water waves

Lenz's law of electromagnetic induction states that

• A. a force is exerted on a current-carrying conductor in a magnetic field
• B. electromotive force id induced in a circuit whenever there is a change in the magnetic flux linked with the circuit
• C. the magnitude of the induced electromotive force in a circuit is proportional to the rate of change of flux linking the circuit
• D. the induced current in a coil is in such a direction that it sets up a magnetic field which opposes the change producing it

According to the kinetic theory of gasses, which of the following property of a gas can be affected by the collision of the gas molecule with the walls of the container?

• A. temperature
• B. energy
• C. viscosity
• D. pressure

Two blocks of the same dimension, one steel and the other wooden are dropped simultaneously from the same height. If they fall freely neglecting air resistance the?

• A. Two blocks hit the ground simultaneously because they have the same acceleration
• B. Two blocks reach the ground at the same time because their dimensions are the same
• C. Wooden block being lighter than the steel block reaches the ground first
• D. Steel block reaches the ground first because it is denser than the wooden block

A piece of cloth appears green in sunlight. When held in red light, it will appear

• A. green
• B. blue
• C. red
• D. black

The fig below shows a uniform wood of weight 200N and length 50m. It is pivoted at one end and suspended by a cord at the other end at an angle of 30 degrees to the wood. calculate the tension in the cord if the wood is horizontal

• A. 10N
• B. 20N
• C. 100N
• D. 200N