The instantaneous value of current in an AC circuit is **i=2sin(100πt+π3)**A.

## What is the formula for instantaneous EMF?

The instantaneous emf and current equations of an A.C. circuit are respectively **e=200sin(ωt+π3)** and i=10sinωt .

## What is an instantaneous current?

Instantaneous Current Definition

Instantaneous current is **given by the amount of charge passing through a conductor at any given instant of time**.

## What is the instantaneous value of AC current?

instantaneous value of ac current is defined as **the value of current at a particular instant irrespective** of the given value which may be the averge over the entire cycle of ac or the rms.

### How do you find the instantaneous value?

The instantaneous values of a sinusoidal waveform is given as the “**Instantaneous value = Maximum value x sin θ ”** and this is generalized by the formula. Where, V_{max} is the maximum voltage induced in the coil and θ = ωt, is the rotational angle of the coil with respect to time.

### What is the instantaneous velocity?

The quantity that tells us how fast an object is moving anywhere along its path is the instantaneous velocity, usually called simply velocity. It is **the average velocity between two points on the path in the limit that the time (and therefore the displacement) between the two points approaches zero**.

### What do you mean by instantaneous value?

Instantaneous Value: **The value of an alternating quantity at a particular instant** is called Instantaneous value. … Frequency: The number of cycles completed by an alternating quantity per second is known as its frequency. It is denoted by f and is measured in Hertz (Hz).

### What is the symbol of instantaneous current?

The magnitude of the waveform has taken at any point of time is called instantaneous value. And the instantaneous value of the alternating quantity is designated by a **lower case letter small e for emf**, small v for voltage and small i for current.

### What is current formula?

The current formula is given as **I = V/R**. The SI unit of current is Ampere (Amp).

### What is the instantaneous value of the emf?

The instantaneous value of the emf is **the projection of the phasor on the horizontal axis**. From this definition, the instantaneous values of emf for a, b, and c are -100V, 60V, and 80V, respectively.

### What is meant by the instantaneous value of an emf?

Instantaneous emf is that **emf value at a particular instant of time**. The peak value of emf is that value of emf where the flux curve has maximum slope. When the slope is zero induced emf also goes to zero.

### What is the rms value of an alternating current?

RMS or root mean square current/voltage of the alternating current/voltage represents the d.c. current/voltage that dissipates the same amount of power as the average power dissipated by the alternating current/voltage. For sinusoidal oscillations, the RMS value **equals peak value divided by the square root of 2**.

### What is the instantaneous value of current through the circuit when the voltage across the inductor is zero?

It only relates the emf produced across the inductor to changes in current because if the flow of inductor current is constant and not changing such as in a steady state DC current, then the induced emf voltage will be zero because the instantaneous rate of current change is zero, **di/dt = 0**.

### How do you calculate instantaneous current in an RLC circuit?

**Instantaneous value of alternating current:**

- i(t)=Imsin(ωt+φ0i)=Imsin(2πft+φ0i)
- i(t)˙=0.79⋅sin(2π50t)A=0.79⋅sin(100πt)A.
- u(t)=Umsin(ωt+φ0u)=Umsin(2πft+φ0u)
- u(t)˙=100⋅sin(2π50t+π4)V=100⋅sin(100πt+π4)V.

### What is the formula for instantaneous value of current for AC through RL circuit?

The instantaneous value of current in an AC circuit is **i = 2sin ( 100pit + pi/3 ) A**.

### What is instantaneous overcurrent relay?

An instantaneous over-current relay is an overcurrent relay which **has no intentional time delay for operation**. … It has low operating time and starts operating instantly when the value of current is more than the relay setting.

### Which of the following is instantaneous relay?

Another popular example of instantaneous relay, is **solenoid type relay**. When current in the solenoid crosses pick up value, the solenoid attracts an iron plunger which moves to close the relay contacts. Balance beam relay is also an well known example of instantaneous relay.

### How do you calculate instantaneous voltage?

Let an instantaneous voltage v be represented by **v = V _{M} sin 2πft volts**. This is a waveform which varies sinusoidally with time t, has a frequency f, and a maximum value, V

_{M}. Alternating voltages are usually assumed to have wave-shapes which are sinusoidal where only one frequency is present.

### What is instantaneous in electrical?

The instantaneous value is “**the value of an alternating quantity** (it may ac voltage or ac current or ac power) at a particular instant of time in the cycle”. There are uncountable number of instantaneous values that exist in a cycle.

### Is instantaneous voltage the same as RMS?

The RMS value is the **square root** of the mean (average) value of the squared function of the instantaneous values. Since an AC voltage rises and falls with time, it takes more AC voltage to produce a given RMS voltage than it would for DC.

### Is instantaneous velocity and velocity same?

Instantaneous velocity definition is given as “The velocity of an object under motion at a specific point of time.” If the object possesses uniform velocity then the instantaneous velocity may be the same as its standard velocity.

### What does instantaneous mean in physics?

Definition: When the speed of an object is constantly changing, the instantaneous speed is the **speed of an object at a particular moment (instant) in time**.