Question 241:

• JAMB 1982

what is the resultant resistance in the circuit given above

A. 11Ω
B. 8Ω
C. 4Ω
D. 3.6Ω
E. 4.3Ω

Question 242:

• JAMB 1982

a body is acted upon by forces applied at points P and Q as shown above their resultant is equal to

A. 2√5N in adirection N 56◦ E
B. 2√5N in adirection N 56◦ W
C. 2√13N in adirection N 56◦ E
D. 2√13N in adirection N 56◦ W
E. √10N in adirection N 56◦ E

Question 243:

• JAMB 1982

A Uniform beam PQ of mass 20kg and length 5m is balanced as shown above, a man of weight 800N stands at M such that QM = 2m. The reaction at P and Q respectively are(take g = 10ms^-2)

A. 300N and 500N
B. 420N and 580N
C. 220N and 380N
D. 580N and 420N
E. 382N and 220N

Question 244:

• JAMB 1982

The value of the series resistor required to convert the above galvanometer into a voltmeter with a full range deflection of 15V is

A. 985 ohms
B. 990 ohms
C. 995 ohms
D. 1000 ohms
E. 1005 ohms

Question 245:

• JAMB 1982

Two mirrors of the same length are arranged as shown above, a ray of light NO strikes the system at O and emerges along PQ. The emergent ray has been deviated through

A. 220 degrees
B. 200 degrees
C. 210 degrees
D. 180 degrees
E. 230 degrees