1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
elena-s [515]
3 years ago
8

The current in a coil with a self inductance of 1.5 mH increases from 0 to 1.0 A in a tenth of a second. What is the induced emf

in the coil
Physics
1 answer:
krok68 [10]3 years ago
3 0

Answer:

the induced emf in the coil is 15 mV.

Explanation:

Given;

self inductance, L = 1.5 mH = 1.5 x 10⁻³ H

change in current = dI = 1.0 A

change in time, dt = 1/10 = 0.1

The induced emf is calculated as;

Induced \ EMF = L (\frac{dI}{dt} )\\\\Induced \ EMF = 1.5  \times  10^{-3}\ (\frac{1}{0.1} )\\\\Induced \ EMF = 1.5  \times  10^{-3} \ \times \ 10\\\\Induced \ EMF = 15  \times  10^{-3} \ V\\\\Induced \ EMF = 15 \ mV

Therefore, the induced emf in the coil is 15 mV.

You might be interested in
Two 2.0 cm by 2.0 cm metal electrodes are spaced 1.0 mm apart and connected by wires of the terminals of a 9.0 V battery.
ale4655 [162]

Answer:

Explanation:

Area of electrodes, A = 2 cm x 2 cm = 4 cm²

Separation between electrodes, d = 1 mm

Voltage, V = 9 V

(a)

Let C is the capacitance between the electrodes

C = \frac{\epsilon _{0}A}{d}

C = \frac{8.854\times 10^{-12}\times 4\times 10^{-4}}{1\times 10^{-3}}

C = 3.54 x 10^-12 F

Let q be the charge on each of the electrode

q = C x V

q = 3.54 x 10^-12 x 9 = 3.2 x 10^-11 C

(b)

As, the battery is disconnected the charge on the electrodes remains same.

(c)

As the battery is connected the voltage is same.

capacitance is change.

As the distance is doubled, the capacitance becomes half and the charge is also halved. q' = q/2 = 1.6 x 10^-11 C

6 0
3 years ago
A car is traveling on a straight, level road under wintry conditions. Seeing a patch of ice ahead of her, the driver of the car
dangina [55]
Her magnitude of deceleration on the ice would be 15.126m/s
5 0
2 years ago
Why does the hood of a car heat up after the car has been running for a while? A) According to the fourth law of thermodynamics,
Svetlanka [38]

Answer:

C) According to the second law of thermodynamics, not all energy from the burnt fuel is used to do work on the piston. It also produces heat which warms other parts of the car.  

Explanation:

A) According to the fourth law of thermodynamics, the temperature of the other parts of the car increases due to the coolant used for the engine.  

B) According to the first law of thermodynamics, the hood of the car heats up using heat from the surroundings in-order to achieve thermal equilibrium with the engine.  

C) According to the second law of thermodynamics, not all energy from the burnt fuel is used to do work on the piston. It also produces heat which warms other parts of the car.  

D) According to the third law of thermodynamics, the increase in the velocity of the car changes the entropy of the tires. To balance this change, the temperature of the other parts is increased.

6 0
3 years ago
Read 2 more answers
If Roger dropped pages instead of mongoer, you would have would have to wait longer to catch them than when you were catching ma
slamgirl [31]
I’m confused retype your question please
8 0
2 years ago
Joaquin mows the lawn at his grandmother’s home during the summer months. Joaquin measured the
nordsb [41]
Velocity is define as how fast an object is moving, and in what direction, it is a vector quantity, meaning velocity has both magnitude and direction. Anything goes to the left is negative, and anything goes to the right is positive.

a. Direction from east to west, given distance 11.5 meters, and time of 7.10 s

V = displacement/time  V = -11.5/7.10 S  V = -1.62 m/s  (going left)

b. Joaquin reaches his original position. Displacement is now zero.

    Velocity of the lawnmower is equal to "zero" but if we calculate for the average speed of the lawn, you just have to add the distance covered and the time it take to go back at the original position or point of origin
7 0
3 years ago
Other questions:
  • Which statements describe how a machine can help make work easier? Select two options.
    9·1 answer
  • What happens to the mass of a metal ball if its heated?
    12·2 answers
  • A proton is moving at 105 m/s at a point where the potential is 10 V. Later, it is at a place where the potential is 5 V. What i
    13·1 answer
  • A concrete block is pulled 7.0 m across a frictionless surface by means of a rope. The tension in the rope is 40 N; and the net
    11·1 answer
  • A wave has a period of 4 seconds. What is its frequency?
    15·1 answer
  • Hey can someone please help me and can u show your work plz plz plz plz
    15·1 answer
  • Is the unit of measurement that is the average distance between the center of the Sun and the center of the Earth.
    5·1 answer
  • A car goes from a speed of 10m/s to 30m/s over 4s. If the car has a mass of 1000kg, How strong is the force pushing the car forw
    5·1 answer
  • tourist travels 1500 miles using two planes. The second plane averages 50 miles per hour faster than the first plane. The touris
    7·1 answer
  • On
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!