MCQ
In the following circuit, $5W$ resistor develops $45 \ J/s$ due to current flowing through it. The power developed per second across $12 W$ resistor is
- A$16 W$
- ✓$192 W$
- C$36 W$
- D$64 W$
✓
Answer
Correct option: B.
$192 W$
$192 W$
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
An astronomical refractive telescope has an objective of focal length $20m$ and an eyepiece of focal length $2\ cm.$
→In Bainbridge mass spectrograph a potential difference of $1000\ V$ is applied between two plates distant $1 \ cm$ apart and magnetic field in $B = 1T.$ The velocity of undeflected positive ions in $m/s$ from the velocity selector is
→Total internal reflection can take place only if:
→- Light goes from optically rarer medium $($smaller refractive index$)$ to optically denser medium.
- Light goes from optically denser medium to rarer medium.
- The refractive indices of the two media are close to each other.
- The refractive indices of the two media are widely different.
Assertion : Fuse wire must have high resistance and low melting point.
Reason : Fuse is used for small current flow only.(a) If both assertion and reason are true and the reason is the correct explanation of the assertion.(b) If both assertion and reason are true but reason is not the correct explanation of the assertion.(c) If assertion is true but reason is false.(d) If the assertion and reason both are false.
Reason : Fuse is used for small current flow only.(a) If both assertion and reason are true and the reason is the correct explanation of the assertion.(b) If both assertion and reason are true but reason is not the correct explanation of the assertion.(c) If assertion is true but reason is false.(d) If the assertion and reason both are false.
A capacitor of 20 μF is charged to 500 volts and connected in parallel with another capacitor of 10 μF and charged to 200 volts. The common potential is(a) 200 volts(b) 300 volts (c) 400 volts(d) 500 volts
In the given current distribution what is the value of $I$
→Kirchoff's first law, i.e., $\sum\text{i}=0$ at a junction, deals with the conservation of:
→Light travels faster in air than that in glass. This is accordance with:
Magnetic moments of two bar magnets may be compared with the help of(a) Deflection magnetometer(b) Vibration magnetometer(c) Both of the above(d) None of the above
Which of the following statements given below is not true in the context of magnetic lines of force?