1
KCET 2026
MCQ (Single Correct Answer)
+1
-0
A small town with a demand of $900\text{ kW}$ of electric power at $220\text{ V}$ is situated $20\text{ km}$ away from an electric power generating station. Each wire of the two-wire transmission line has a resistance per unit length of $5 \times 10^{-4} \, \Omega\text{ m}^{-1}$. The town gets power from the line through a $45000\text{ V}$ to $220\text{ V}$ step-down transformer at a substation in the town. The line power loss in the form of heat is:
A
$4$ kW
B
$8$ kW
C
$40$ kW
D
$80$ kW
2
KCET 2026
MCQ (Single Correct Answer)
+1
-0
A light bulb rated $100$ W is connected to an AC source of $220$ V, $50$ Hz. The rms current through the bulb is
A
$0.454$ A
B
$0.545$ A
C
$2.20$ A
D
$0.22$ A
3
KCET 2026
MCQ (Single Correct Answer)
+1
-0
In a circuit containing a pure resistor connected to an AC source,
A
Voltage leads the current by $90^\circ$
B
Current leads the voltage by $90^\circ$
C
Voltage and current are in same phase with each other
D
Current leads the voltage by $180^\circ$
4
KCET 2026
MCQ (Single Correct Answer)
+1
-0
What range of electromagnetic spectrum is considered as light?
A
$1$ mm to $700$ nm
B
$400$ nm to $1$ nm
C
$400$ nm to $700$ nm
D
$1$ nm to $10^{-3}$ nm