Post Utme Physics Past Questions and Answers

Question 1056:

A erect image three line the size of the object is obtainedron a congave mirror of radius of curvature $36cm$, what is the position of the object from the mirror?

A. $24cm$
B. $12cm$
C. $10cm$
D. $8cm$

Question 1057:

The angle of deviator of light of various colours passing through a glass prism decrease in the order

A. Red, blue and orange
B. Blue, red, orange
C. Red orange, blue
D. Orange, blue, red

Question 1058:

Two positive point charge of $12\mu C$ andi $\mu \mu C$ respectively are $10cm$ apart. The work done is bringing them $4cm$ closer $T$ is $(K=9\times {10}^2{N}^{2}m{c}^2)$

A. $600J$
B. $300J$
C. $6.8J$
D. $518J$

Question 1059:

The effective capacitance of a system capacitors arranged such that a $4\mu F$ capacitor is in series with $3\mu F$.

A. $1.7\mu F$
B. $3.0\mu F$
C. $4F$
D. 5.0 $F$

Question 1060:

How long will it ake to heat $3kg$ of water from ${28}^{\circ }C$ to ${88}^{\circ }C$ using an electric kettle, which taps $6A$ from a $210V$ supply?

A. $5.6$ n minutes
B. $9.6$ minutes
C. $10.0$ minutes
D. $19.3$ minutes