Question

In: Physics

1. If the amount of charge in 1 electron (elementary charge) is approximately 1.6×10−19 C, calculate...

1.

If the amount of charge in 1 electron (elementary charge) is approximately 1.6×10⁻¹⁹ C, calculate the number of electrons passing a point in the wire in 20 minutes when the current is 1.0A

		3.2 X 10⁻¹⁸
		1.92 X 10⁻¹⁷
		7.5 X 10²⁰
		7.5 X 10²¹

2.

Three resistors: 10 ohms, 20 ohms and 40 ohms. If all three are connected in parallel, how much is the equivalent resistor value if replaced with one resistor?

		70 ohms
		5.7 ohms
		0.175 ohm
		35 ohms

3.

If a 4 µF capacitor has been fully charged by connecting with a 1.5 volts battery, how much the charge amount on the capacitor in the unit of coulomb (C) ?

		6 C
		2.67 C
		0.000006 C
		0.006 C
		0.6 C

4.

What is the maximum angle with which a light ray can incident on a glass-air interface and still refract? The index of refraction of glass is 1.4 and is 1.0 for the air.

		30 degree
		38 degree
		41.8 degree
		45.6 degree

5.

In "magnetic force on a current carrying wire" experiment, using the data for force(y-axis, in Newton) versus length (in meters), someone obtained a linear curve fit equation: y=0.1x+2. If in the experiment, the wire carrying a current I=2.0 A, how strong is the magnetic field?

		0.1 T
		0.05 T
		2 T
		0.2 T

6.

Two resistors are connected in parallel. What best describes the currents measured of each resistor?

		They will be equal, and will be the same as everywhere in the circuit
		They will be proportional to the resistance, with the bigger current passing the bigger resistor
		They will be inversely proportional, with the bigger current passing the smaller resistor
		You cannot predict without seeing the circuit

Expert Solution

genius_generous answered 2 years ago

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