By connecting two identical storage batteries together in series ("+" to "-" to "+" to "-"), and placing them in a circuit, the combination will yield:a. zero volts.
b. twice the voltage and the same current will flow through each.
c. the same voltage and different current will flow through each.
d. twice the voltage and different currents will flwo through each.
Answers
Answer: option B
Explanation: each cell is suppose to have an emf and an internal resistance.
Let E1 be the emf of the first battery and E2 be the emf of the second battery.
Et is the total emf.
Going by the connection described above, it is a series arrangement.
Hence the total emf is calculated as sum of individual emf
Et = E1 + E2
But each cell are identical, hence E1 = E2 = E
Et = E + E = 2E.
Hence the total voltage is twice the voltage.
Since the connection is a series arrangement, the current passing through each cell is the same.
These points have made option B the correct answer.
Answer:
b) Twice the voltage and the same current
Explanation:
The two batteries are identical, and are connected in series. When elements in a circuit are connected in series, the same current flow through them but the voltage drops are additive.
Since the two batteries are identical, the possess the same voltage of magnitude V.
Therefore, the total voltage,
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The wavelength of violet light with a frequency of 750 × 10^12 Hz is 400 nanometers (nm).
Wavelength is the distance between two consecutive peaks or troughs of a wave, representing the length of one complete cycle of the wave. It is commonly used to describe the size or scale of various types of waves, including electromagnetic waves such as light.
To calculate the wavelength of light, you can use the formula:
wavelength = speed of light/frequency
The speed of light is approximately 3.00 × 10^8 meters per second.
Let's plug in the values:
frequency = 750 × 10^12 Hz
speed of light = 3.00 × 10^8 m/s
wavelength = (3.00 × 10^8 m/s) / (750 × 10^12 Hz)
Simplifying the expression:
wavelength = (3.00 / 750) × (10^8 / 10^12) m
wavelength = 4.00 × 10^-4 m
Therefore, the wavelength of violet light is approximately 4.00 × 10^-4 meters or 400 nanometers (nm).
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L = (299,792,458 m/s) / (750E12 Hz) = 3.9972E-7 = 399.72E-9
or roughly 400 nanometers
b. Yes, the force applied is parallel to the direction of motion.
c. No, the force applied is perpendicular to the direction of motion.
d. Yes, the force applied is perpendicular to the direction of motion.
Answers
Answer:
No, the force applied is perpendicular to the direction of motion.
Explanation:
Work done is given by :
F = force
d = displacement
= angle between force and displacement
Work is positive when the force and the displacement are in same direction. Work is negative when the force and the displacement are in opposite direction. When the force and displacement are perpendicular to each other, no work is done.
If we carry a book across the room at a constant velocity, the work done is zero. This is because our weight is acting vertically downward and we are moving forward. The angle between the force and the displacement is 90. So, no work is done.
Hence, the correct option is (c) "No, the force applied is perpendicular to the direction of motion".
at a constant velocity?
The force applied is perpendicular to the direction of motion. (C)
Answers
15 seconds
10 seconds
5 seconds
Answers
Answer: 10 seconds
A period is the time needed to complete one cycle. Period can be obtained by dividing the total time over the total number of waves.
T (period) = 60 secs / 6 waves
T = 10 secs
a. True
b. False
Answers
Answers
Voltage would be necessary to generate 10 amps of current in a circuit that has 5 ohms of resistance will be 50 V
What is ohm's law ?
Ohm's law is a law that states that the voltage across a resistor is directly proportional to the current flowing through the resistance
using ohm's law
V = IR
V = voltage in a circuit = ?
I = current = 10 A
R = Total resistance in the circuit = 5 ohm
V = IR
= 10 A * 5 ohm
= 50 V
voltage would be necessary to generate 10 amps of current in a circuit that has 5 ohms of resistance will be 50 V
learn more about ohm's law
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