Question

1. Two charges, -q and +q, exert forces on a third charge +q, (shown in grey). What is the direction of the net force on the grey charge? A) left B) down (i.e. towards bottom of page) C) right D) up (i.e. towards top of page) 2. What charge magnitude creates a 1.8N/C electric field at a point 2m away? A) 0.4nC B) 0.8 nC C) 3.6 nC D) 0.8 C 3. The potential difference between two plates of a parallel plate capacitor equals 1,000V. A proton with mass m = 1.67 x 10^-27 kg is released from rest at the positive plate. The proton's speed as it arrives at the negative plate equals: A) 4.4×10^5m/s B) 1.9×10^11m/s C) 1.9×10^7m/s D) 2.2×10^5m/s 4. Given that 1eV = 1.6x10^-19J, the proton in problem 5 arrives at the negative plate with a kinetic energy of A) 1 keV B) 1,000 J C) 1.6×10^-16 eV D) 1,600 J 5. Current flows through a resistor which consists of two segments of equal lengths and equal radii. Their resistivities differ, with ?1=3?2. If I1 is the current flowing in segment 1, how big is the current flowing in segment 2, I2? A) I2=?I1 B) I2=I1 C) I2=3I1 D) I2=9I1 6. A nichrome wire (resistivity 1.5×10^-6 ?/m) is 30 cm long and has a circular cross section with a diameter 1.0mm. The resistance of the wire is A) 0.57 ? B) 2.8×10^-4 ? C) 0.14 ? D) 57?

          1. Two charges, -q and +q, exert forces on a third charge +q, (shown in grey). What is the direction of the net force on the grey charge?
A) left
B) down (i.e. towards bottom of page)
C) right
D) up (i.e. towards top of page)
2. What charge magnitude creates a 1.8N/C electric field at a point 2m away?
A) 0.4nC
B) 0.8 nC
C) 3.6 nC
D) 0.8 C
3. The potential difference between two plates of a parallel plate capacitor equals 1,000V. A proton with mass m = 1.67 x 10^-27 kg is released from rest at the positive plate. The proton's speed as it arrives at the negative plate equals:
A) 4.4×10^5m/s
B) 1.9×10^11m/s
C) 1.9×10^7m/s
D) 2.2×10^5m/s
4. Given that 1eV = 1.6x10^-19J, the proton in problem 5 arrives at the negative plate with a kinetic energy of
A) 1 keV
B) 1,000 J
C) 1.6×10^-16 eV
D) 1,600 J
5. Current flows through a resistor which consists of two segments of equal lengths and equal radii. Their resistivities differ, with ?1=3?2. If I1 is the current flowing in segment 1, how big is the current flowing in segment 2, I2?
A) I2=?I1
B) I2=I1
C) I2=3I1
D) I2=9I1
6. A nichrome wire (resistivity 1.5×10^-6 ?/m) is 30 cm long and has a circular cross section with a diameter 1.0mm. The resistance of the wire is
A) 0.57 ?
B) 2.8×10^-4 ?
C) 0.14 ?
D) 57?

1. Two charges, -q and +q, exert forces on a third charge +q, (shown in grey). What is the direction of the net force on the grey charge?
A) left
B) down (i.e. towards bottom of page)
C) right
D) up (i.e. towards top of page)
2. What charge magnitude creates a 1.8N/C electric field at a point 2m away?
A) 0.4nC
B) 0.8 nC
C) 3.6 nC
D) 0.8 C
3. The potential difference between two plates of a parallel plate capacitor equals 1,000V. A proton with mass m = 1.67 x 10^-27 kg is released from rest at the positive plate. The proton's speed as it arrives at the negative plate equals:
A) 4.4×10^5m/s
B) 1.9×10^11m/s
C) 1.9×10^7m/s
D) 2.2×10^5m/s
4. Given that 1eV = 1.6x10^-19J, the proton in problem 5 arrives at the negative plate with a kinetic energy of
A) 1 keV
B) 1,000 J
C) 1.6×10^-16 eV
D) 1,600 J
5. Current flows through a resistor which consists of two segments of equal lengths and equal radii. Their resistivities differ, with ?1=3?2. If I1 is the current flowing in segment 1, how big is the current flowing in segment 2, I2?
A) I2=?I1
B) I2=I1
C) I2=3I1
D) I2=9I1
6. A nichrome wire (resistivity 1.5×10^-6 ?/m) is 30 cm long and has a circular cross section with a diameter 1.0mm. The resistance of the wire is
A) 0.57 ?
B) 2.8×10^-4 ?
C) 0.14 ?
D) 57?

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