Physics Past Questions and Answers

The electrolyte in the Nickei-iron (Nife) accumulator is

A Potassium hydroxide solution
B Dilute tetraoxosulphate(VI)acid
C Copper tetraoxosulphate(VI)solution
D Ammonium chloride solution

Question 17:

During electrolysis, 2.0 g of a metal is deposited using a current of 0.5 A in 3 hours. The mass of the same metal which can be deposited using a current of 1.5 A in 1 hour is?

A 1.0 g
B 0.5 g
C 3.0 g
D 2.0 g

Question 18:

When a certain a.c supply is connected to a lamp, it lights with the same brightness as it does with a 12 V d.c battery. Then r.m.s value of the a.c supply is?

A 12.0 V
B 3.5 V
C 17.0 V
D 8.5

Question 19:

An ammeter of resistance 5â„¦ has a full-scale deflection when a current of 50 mA flows in it. The value of the resistor required to adapt it to measure a current of 5 A is?

A 0.25â„¦
B 5.00Ω
C 19.80â„¦
D 0.05â„¦

Question 20:

The motion of smoke particles from a chimney is typical of?

A Random motion
B Circular motion
C Rotational motion
D Oscillatory motion