Round 1: Physics Portion (for all sections)

Proton is 1836 times heavier than electron. Its charge is

• 1836 times that of electron

• greater than electron

• less than electron

• equal to electron

he value of the capacitance depends upon the

• thickness of the capacitor’s plates

• density of the capacitor’s plates

• resistance of the capacitor’s plates

• geometry of the capacitor’s plates

A wire of uniform area of cross-section A, length L and resistance R is cut into two parts. Resistivity of each part

• remains the same

• is doubled

• is halved

• becomes zero

the curie temperature is the temperature at which

• paramagnetic materials become diamagnetic

• diamagnetic becomes ferromagnetic

• ferromagnetic becomes paramagnetic

• paramagnetic material becomes ferromagnetic

In which case the maximum power is dissipated in the circuit, when the following resisters are connected individually with a battery of 12V

• 
• 
• 
• 

When the wheatstone bridge is balanced, the galvanometer shows null deflection because

• both the terminals of the galvanometer are at the different potential

• both the terminals of the galvanometer are at the same potential

• the resistance of galvanometer becomes maximum

• the resistance of galvanometer becomes zero

What will be the strength magnetic field when we double the number of turns and the length of a solenoid?

• Become half

• Become two times

• Becomes four times

• Remains the same

The sensitivity of a galvanometer can be increased by decreasing

• c, couple for a unit twist

• N, number of turns of the coil

• A, area of the coil

• B, value of external magnetic field

If the distance between the two-point charges become half, then the force between them becomes

• one fourth

• halved

• doubled

• four times

Gauss’s law is valid ONLY for

• open surfaces

• closed surfaces

• regularly close surfaces

• irregularly open surfaces