Question

An electromagnet creates a uniform magnetic field which penetrates a 39-turn 15 cm diameter coil placed within the uniform field. At what rate must the magnetic field created by the electromagnet change in order to induce an emf of 77 volts in the coil?

Question options:

	15 T/s
	none of these
	39 T/s
	1.1 x 10^2 T/s
	77 T/s

Question

An electric power tool operates from a 12 V battery rated at 1.6x10^2 ampere-hours. How much energy does this battery store?

Question options:

	0.69 MJ
	none of these
	69 MJ
	6.9 MJ
	0.069 MJ

Question 25 (1 point)

In the circuit shown, i_1 is measured to be 2.4 A.   What is the current i_2?

Question options:

	-0.60 A
	0.00 A
	0.30 A
	0.60 A
	-0.30 A

Question

A battery V = 24.0 volts, a resistor R_1 = 12.0 Ohm and a resistor R_2 = 4.0 Ohm are wired into a circuit with an ideal voltmeter connected across R_2. See the figure.   What is the reading of the voltmeter?

Question options:

	6.0 V
	18.0 V
	12.0 V
	24.0 V
	4.0 V