# Multiple Choice Question (MCQ) of Measurements page-14

131. The internal resistance of an ammeter will be

a) Infinity
b) Zero
c) Very small
d) Large

Ans: (c)

132. The internal resistance of the voltameter is

a) Zero
b) Very high
c) Infinity
d) Very small

Ans: (b)

a) Moving coil instruments
b) Induction type instruments
c) Permanent magnet instruments
d) Hotwire instruments

Ans: (d)

134. The impulse ratio of any insulator is

a) Zero
b) Unity
c) Less than unity
d) More than unity

Ans: (d)

135.The impulse ratio depends on the

a) Polarity of the impulse voltage
b) Steepness of the impulse wave-front
c) Time of decay of the impulse voltage
d) All the above

Ans: (d)

136. “The magnetic strength is inversely proportional to the distance from the conductor in which the current flows.” The above law is known as

a) Lenz’s Law
b) Biot Law
c) Biot and Savart’s Law
d) Ampere’s Theorem

Ans: (c)

137. The value of magnetizing force H = NI/L is true for a solenoid only when

a) Radius of the solenoid is more than length
b) Radius of the solenoid is much less than its length
c) Radius of the solenoid is equal to length of the solenoid
d) Number of turns are unlimited

Ans: (b)

138.The magnetization curve is shown below. The ratio of ∆B to ∆H is known as :

a) Permeability
b) Incremental permeability
c) Flux density
d) Incremental magnetization force

Ans: (b)

139. Which of the following dimensions are for electrical charge?

a) LT-2
b) MLT-2
c) ε1/2 L3/2 M1/2 T-1
d) LT-1

Ans: (c)

140. Dimension of the current are

a) LT-2
b) MLT-2
c) ε1/2 L3/2 M1/2 T-2
d) ε1/2 L2 M-1/2 T2

Ans: (c)