Question 4311:

• WAEC 2021

The acceleration of a moving object can be determined from the?

A. Slope of its distance-time graph.
B. Area under its distance-time graph.
C. Slope of its velocity-time graph.
D. Area under its velocity-time graph

Question 4312:

• WAEC 2021

A student wishes to measure the potential difference across a resistor,R. She has a galvanometer,G and some connecting wires.
What else does she need?

A. High value resistor connected in parallel with G
B. . low value resistor connected in parallel with G low value
C. Resistor connected in series with G
D. High value resistor connected in series with G.

Question 4313:

• WAEC 2021

The handle of a screw jack is 35 cm long and pitch of the screw is 0.5 cm. What force must be applied at the end of the handle to lift a load of 2000N, if the efficiency of the jack is 30% [π = 22/7]?

A. 152.0N
B. 132.0N
C. 15.2N
D. 440.0N

Question 4314:

• WAEC 2021

The inductive reactance in a circuit of frequency 100Hz is 1ohms. Calculate the inductance of the inductor[π = 3.14]

A. 2.00 x 10\(_{-3}\)H
B. 1.59 x 10\(_{-3}\)H
C. 1.09 x 10\(_{-3}\)H
D. 6.28x 10\(_{-3}\)H

Question 4315:

• WAEC 2021

The diagram illustrates the velocity- time graph of a body. Calculate the distance covered by the body. during the motion.

A. 15m
B. 84m
C. 72m
D. 48m