Physics Questions
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Positively charged particles will tend to move towards ____ potential, whereas negatively charged particles will tend to move towards ____ potential.(A) Higher, Lower (B) Lower, Higher (C) Positive, 0 (D) 0 , Negative:
What equation is used to relate the Voltage drops (V1, V2, etc) across all of the resistors to the total Voltage (Vt) of a circuit when resistors are in parallel?
Which of the following best describes the relationship between Temperature and Resistivity? (A) Increasing Temperature generally increases Resistivity (B) Increasing Temperature generally decreases Resistivity (C) There is no relationship between Temperature and Resistivity at all
The total Voltage for a circuit with resistors in series is equal to 4.7 V. If R1 = 2.3 Ω, R2 = 6.5 Ω, and R3 = 9.7 Ω, what is the current? (A) .254 (B) .463 (C) 1.12 (D) 3.87
The coulomb constant is 9 · 10⁹ N·m²/C². Three point charges are arranged on a line in order A, B, C. Particles A, B and C have charges of 4 μC, 2 μC, and 3 μC respectively. If r1 (between A and B) and r2 (between B and C) are 1 m and .5 m respectively, what is the magnitude of the net force acting on charge B? a) 0.072 N b) 0.144 N c) 0.288 N d) 0.216 N
The total Voltage for a circuit with resistors in parallel is equal to 3.2 V. If R1 = 2.3 Ω, R2 = 6.5 Ω, and R3 = 9.7 Ω, what is the current that is going through R3 (I3)? (A) 3.29 (B) 1.33 (C) 2.04 (D) 0.33
According to the Principle of Superposition, how would you determine the Net Electric Force on a single charge? (A) By adding the magnitudes of charges and finding the most common direction. (B) By adding the magnitudes of charges only. (C) By adding the vectors of individual electrostatic interactions together. (D) By subtracting the vectors of individual electrostatic interactions.
Fill in the blanks: Resistors in _____ must have the same Voltage, but may have different currents. Resistors in ____ must have the same current, but may have different Voltages.(A) Series, Parallel (B) Parallel, Series
Relationship between resistivity and conductivity
The cell membrane, a phospholipid bilayer, resists the flow of charged ions, which have difficulty permeating the hydrophobic fatty acids of the membrane. If the radius of a cell membrane with resistance R is doubled, what is the value of the new resistance? a) 2R b) R/2 c) 4R d) R/4
What equation is used to relate the Current (I1, I2, etc) across all of the resistors to the total Current (It) of a circuit when resistors are in series?
When we talk about Conductivity, there are a few main categories. Which of the following are key categories of Conductivity?I. Electrolytic II. Metallic III. Halogenic
A scientist designs a model of the circulatory system that has a pipe leading out of a pump at a flow rate of 4 kg/m⁴s. This pipe diverges into two pipes that run parallel to each other, each with a flow rate of 6 kg/m⁴s. The two pipes converge back to the original pipe. What is the total resistance of the system constructed by the scientist? a) 7 kg/m⁴s b) 0.7 kg/m⁴s c) 17 kg/m⁴s d) 8 kg/m⁴s
A Test Charge (2.5⋅10^-16 C) is placed 2.4 meters from a Source Charge (7.8⋅10^-13 C). What is the strength of the Electric Field? (A) 7.89⋅10^-2 N/C (B) 3.22⋅10^-2 N/C (C) 6.75⋅10^-3 N/C (D) 1.22⋅10^-3 N/C
A sensory neuron's cell membrane has a resting membrane potential of -70mV. A nearby sodium ion feels an electric force Fe causing the sodium ion to move towards the membrane. What is the magnitude of the electric force when the sodium ion is at half of its original distance away from the membrane? a) F/2 b) F/4 c) 2F d) 4F
True or False. It is possible for a certain particle with a charge of +9 C to split into two smaller particles with charges of +3 C and +5 C as long as 1 C of charge is converted into heat.
If you double the distance between two charges, how would the Electrostatic Force between them change? (A) It would quadruple (B) It would double (C) It would be halved (D) It would be quartered
Knowing that F = q x E, use Newton's Second Law to find the acceleration caused by the charge in the electric field
A rectangular coil, with corners labeled ABCD, has length L and width w. It is placed between the poles of a magnet, as shown in the figure. If there is a current I flowing through this coil in the direction shown, what is the direction of the force acting on section CD of this coil?
All waves carry energy from one location to another true or false