A battery and five resistors of equal resistance are arranged as shown in the fi

Question

A battery and five resistors of equal resistance are arranged as shown in the figure below which resistor dissipates the most power? R_1 R_2 R_3 R_5 The power dissipated by each resistor is the same for tall resistors. In figure below, a solenoid produces a magnetic field whose strength increases into the plane of the page. An induced EMF is established in a conducting loop surrounding the solenoid and this EMF lights bulbs A and B. In figure points P and Q are shorted (that is a wire with negligible resistance is connected across points P and Q). After the short is inserted. Bulb A turns off and bulb B gets brighter. Bulb B turns off and bulb A gets brighter. Bulb A turns off and bulb B gets brighter. Bulb B turns off and bulb A gets brighter. Both bulbs go out. The current through an infinitely long solenoid is decreased linearly as a function of time. The figure below represents a cross section of the solenoid with the direction of the arrow indication the current and the dots indicating the direction of the magnetic field. An electron is placed initially at rest outside the solenoid. The force the electron experiences at the instant it is released is best represented by which of the following arrows

Explanation / Answer

Q.3 Option D R5 is correct option.

Q.4. Option A is correct

A counter clockwise current set up from P to Q and back again as per Lenz's law. Since this current passes through A and B, the bulb turn on. When the loop is sorted by wire the same current must flow but now it passes through B only . Without A in the circuit. The overall resistance decreases hhowever the current is the same, to the potential drop across B increases as per Ohm's law, so B glows brighter.

Q.5. Option A is correct option.

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