Electromagnetic Force Emf Potential Difference Pd Current Internal Resistance Of A Cell And Lost Volt - Physics Jamb Past Questions and Answers

Question 1 :

• JAMB 2019

If the time of flight is 96seconds, calculate the horizontal range through the point of projection.

A. 84400m
B. 69000m
C. 61440m
D. 24000m

Question 2 :

• JAMB 1978

A magnet is moved through a coil of wire. The e.m.f. produced in the wire depends on

A. The number of turns in the coil
B. The strength of the magnet
C. The speed at which the magnet is moved
D. All of the above
E. None of the above

Question 3 :

• JAMB 1979

A capacitor and a resistor are connected in series with each other and in series with an accumulator of negligible internal resistance. The potential across the terminals of the capacitor is

A. Twice the e.m.f of the accumulator
B. Less than the e.m.f by the potential drop across the resistor
C. Zero
D. The same as the e.m.f.
E. Greater than

Question 4 :

• JAMB 1979

In a given circuit, the cell P has an emf 1.5V and an unknown internal resistance while cell Q has an emf 2.0V and an internal resistance of 1 ohm if the ammeter reads 50m A, Then r is equal to

A. 0.5 ohm
B. 0.62 ohm
C. 1.0 ohm
D. 2.0 ohm
E. 3.0 ohm

Question 5 :

• JAMB 1980

A milliameter of resistance 5\(\Omega\) and full scale deflection of 5m A is to used to measure a potential difference of 50 V. The resistance of the multiplier should be

A. 95\(\Omega\)
B. 110\(\Omega\)
C. 595\(\Omega\)
D. 995\(\Omega\)
E. 1005\(\Omega\)