1.
If the amount of charge in 1 electron (elementary charge) isapproximately 1.6×10−19 C, calculate the number ofelectrons passing a point in the wire in 20 minutes when thecurrent is 1.0A
| | 3.2 X 10−18 |
| | 1.92 X 10−17 |
| | 7.5 XÂ Â 1020 |
| | 7.5 XÂ Â 1021 |
2.
Three resistors: 10 ohms, 20 ohms and 40 ohms. If all three areconnected in parallel, how much is the equivalent resistor value ifreplaced with one resistor? Â
| | 70 ohms |
| | 5.7 ohms |
| | 0.175 ohm |
| | 35 ohms |
3.
If a 4 µF capacitor has been fully charged by connecting with a1.5 volts battery, how much the charge amount on the capacitor inthe 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 ona glass-air interface and still refract? The index of refraction ofglass 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, usingthe data for force(y-axis, in Newton) versus length (in meters),someone obtained a linear curve fit equation: y=0.1x+2. If in theexperiment, the wire carrying a current I=2.0 A, how strong is themagnetic field?
6.
Two resistors are connected in parallel. What best describes thecurrents measured of each resistor?
| | They will be equal, and will be the same as everywhere in thecircuit |
| | They will be proportional to the resistance, with the biggercurrent passing the bigger resistor |
| | They will be inversely proportional, with the bigger currentpassing the smaller resistor |
| | You cannot predict without seeing the circuit |
