Question 4786:

An ammeter of resistance \(S\) has a fullscale deflection when a current of \(50 \mathrm{~mA}\) flows in it. The value of the resistor required to adapt It to measure a current of \(5 \mathrm{~A}\) is ____________

A. \(5.00\)
B. \(0.05\)
C. \(19.8 \mathrm{ft}\)
D. \(0.25\)

Question 4787:

Two cell each of e.m.f \(1.5 \mathrm{~V}\) and an internal resistance 2 ohms are connected in parallel. Calculate the current flowing when the cells are connected to a 1 ohms resistor.

A. \(0.75 \mathrm{ohms}\)
B. \(1.50 \mathrm{hms}\)
C. 0 ohms
D. \(1.0 \mathrm{ohms}\)
E. \(0.600 \mathrm{ohs}\)

Question 4788:

The capacitance of a parallel plate capacitor when in air is 3 of and in the presence of a dielectric material 6 of. The dielectric constant is ____________

A. 9
B. 18
C. 3
D. 2

Question 4789:

Which of the following may be used to determine relative humidity in a physics laboratory?
I. Manometer
II. Wet-and-dry bulb hygrometer
III. Hair hygrometer
IV. A hydrometer

A. I only
B. II and only
C. II only
D. III only
E. II, III and IV only

Question 4790:

An electric heater with a p.d of \(240 \mathrm{~V}\) connected across its terminals has a total resistance of \(960 \mathrm{~g}\) find the power rating of the heater

A. \(0.25 \mathrm{~W}\)
B. \(60.00 \mathrm{~W}\)
C. \(38 A O W\)
D. AOOW