# Electromagnetic Induction Questions and Answers

Physics
Electromagnetic Induction Solutions
12. Which of the following would step-down the voltage that comes in to a transformer? Select all that apply. the primary coil and the second coil have the same number of turns the primary coil has
Physics
Electromagnetic Induction Solutions
3. Which of the following states the Faraday's Law? The strength of the electrostatic force between two charged particles is directly proportional to the product of the charges and inversely
Physics
Electromagnetic Induction Solutions
9. A current is induced as it moves through a magnetic field. What would happen to the current if it were to be moved through a stronger magnetic field? the induced current will increase the induced
Physics
Electromagnetic Induction Solutions
Two inductors: 1 mH and 100 μH are connected in series. How fast should the current change over time to produce a constant voltage of 33 mV across both of them (i.e. across the equivalent inductor).
Physics
Electromagnetic Induction Solutions
A single circular loop of wire is placed inside a long solenoid. The area vector of the loop is aligned with that of the solenoid. The area of the loop is A₁, and that of the solenoid is A₂. The
Physics
Electromagnetic Induction Solutions
In the figure below, a rectangular loop of wire is in a region of space where there is a magnetic field that is everywhere directed into the page and decreasing. Which of the following is/are correct?
Physics
Electromagnetic Induction Solutions
A step-up transformer has 906 turns on its primary coil. If the input voltage is 94 V and the output Voltage is 150 V, how many turns are on the secondary coil? Round your answer to the nearest whole
Physics
Electromagnetic Induction Solutions
Inductive charging is used to wirelessly charge electronic devices ranging from toothbrushes to cell phones. Suppose the base unit of an inductive charger produces a 1.20 x 10^-3 T magnetic field
Physics
Electromagnetic Induction Solutions
A car with a 1.49 m long radio antenna travels at 104 km/h in a place where the Earth's magnetic field is 7.21 × 10−5 T. What is the maximum possible induced emf in the antenna as it moves through the
Physics
Electromagnetic Induction Solutions
In a step down transformer input voltage is 20000 volts and number of turns in primary are 4000. The supply voltage at which electricity is being distributed is 200 volts. Then number of turns in
Physics
Electromagnetic Induction Solutions
The charger cord used to recharge a cell phone contains a transformer that reduces 240 V AC to 5 V AC. For each 1,125 turns in the input coil, how many turns are there in the output coil? (Round your
Physics
Electromagnetic Induction Solutions
A long straight wire carrying a current of 2.61 A moves with a constant speed v to the right. A 5 turn circular coil of diameter 12.5 cm, and resistance of 3.25 un, lies stationary in the same plane